Oh man, that must have been fun to build. So many wild building techniques wrapped up in one tremendous creation. That's a keeper if ever there was one!

Alan

I'm a human BEING, not a human doing!The two most important days of your life are the day you are born
and the day you discover why. (Donald Sensing)
One plus one equals three... for large values of one. (Bruce Fournier)

I suspect that Infyrana is the parent and the kid just gets to play with it. If I'm wrong and that kid built it, just wait until he gets a little experience under his belt...

Looking further, I noticed a couple of things I missed in my original post. Perhaps the coolest aspect is the inclusion of these little curved wall sections:
that allow him to connect up the walls at angles other than 90 degrees. See the front wall in this pic:

Also, the whole thing is modular, and the walls and towers can be combined in different ways:

I saw this on my lunch hour. I really like the combination and variety of shapes for this castle - I have been experimenting with round stuff lately, so this is inspiring. I wish there was a way to do circles without the rounds
Lucky kid is right.

It really is a nice castle. I particularly like the triangular tower! The modular nature of this castle is fantastic, and most of the shown combinations look great. Now THAT would have been a deserving entry into the Yellow Castle category in the CCC!